Insulator-pin.



; INSULQTOR PIN. fAPP'LgoATIo-N HLED ocT.19, 1910.

` 'Patented Jn. 2,1912.

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MM mkh 'UNITED sTATEs PATENT oEEToE.

WALTER il'. WILSON, OF PITTSBURGH, PENNSYLVANIA.

INSULATOR-PIN.

Specification cf Letters Patent.

' Patented Jan. 2,1912.

Application filed October 19, 1910. Serial No. 587,811.

v'liei'ein certain peculiar conditions are usually met with which differ from those common in ordinary line construction. Its objects are to provide a pin or device of this character, which may be made much Ymore cheaply and rapidly than those heretofore in use, which will not be apt to be broken when bein/ g driven into place, which will be sutiicientlyj. tuing so as to tit tightly within the hole into which it driven, and which will have such other advantages as will be fully disclosed hereinafter.

In the accompanying drawings illustrating my invention-figure l illustrates two connected halves of a pin formed of a single strip of metal preparatory to being folded together to make the completed pin; Fig. 2 is a side view of the completed pin, showing an insulator in connection therewith; and Fig. 3 is a. view similar tol Fig. 2, showing a modified form of construction.

One of the principal features of my'invcntion is the forming of the insulator pin out of material which can be drawn, such Afor instance as dutile sheet metal, sheet steel, or other suitable material; and in its preferred form I make a split pin in one piece from such ductile sheet metal. F or instance. as indicated in Figs. 1 and 2, the pin 4 is made An two halves 5 and G, preferably 'in one operation or series of operations as may Je necessar To do this the two halves are struck uprom a. suitable blank, `with their pointed ends Ileft connected by means of a short strip 7. These t-Wo halves are made in the form of half tubes, with their outer ends 8 provided with means, such asA screw threads, for engagement with the insulator 9. Along the edges of these half pins, I4

prefer to form teeth or serrations l0 which match With the th readedhends 8 so that when the parts are folded together, the threaded ends will'beproperly alined to form complete screw threads. The inner ends 1l of the half pin sections are preferably enlarged, as indicated in Figs. l and 2, at a short distance from the ends and are also given a somewhat sharpenedor oointed effect, so that when the parts are fo ded together, the completed pin may be readily driven into the'hole made for it. lVliele'this enlargement or bulging occurs, I also prefer to leave openings 12 at the sides of the pin so as to give more or less resiliency to the en- This engaging part of the larged portion. pin may also be provided with one or more barbs (r1-'projections 18 struckup out of the' body of the metal and adapted to serve in preventing the withdrawal of the pin. After the split. pin has been formed in olie piece, as indicated in Fig. l, the two halves are folded together as clearly shown in Firr: 2, thereby forming the completed p'in, 'the tongue or connecting strip v7 being ordinarily sutlicient to hold the parts in position ready for `driving and also serving to'pro` vide a sharpened end at the driving point.. Then the two halves are thus folded together, lthe saw teeth or indentations 10 cause the `threaded ends to be brought into proper alinement to be engaged by the threaded insulator). f If desired, a slot 14 may be left at one or. both sides of the ythreaded ends and extended somewhat beyond the threaded and enlarged port-ion of the pin. This slot will give the threaded ends a certain amount of additional resiliency so as to firmly hold the insulator, and its upper end also provides an opening vthrough which water may pass from the upper part of the insulator, down through the center of the pin, and out at the lower end thereof, -without coming in contact with vthe wire supported by the insulator. If the lpm is driven downwardly so that the insulator is at the top thereof, this opening also serves to allow the water to pass in the opposite direction.

It will be observed that my improved pin vmay bemade very rapidly and cheaply from sheet metal, such as steel or other suitable material, and when the pin is driven into the hole made for it,.for instance in the roof of a mine, it will, on 'accountof its comparative resiliency and-tiexibility, fit tightly Within the hole and also be securely held iig, position, andthere Will belkittle or no danger of I ln this instance, instead of' comparatively' i. of connection -might be used Withmy but are preferably"securedtogether inl some" convenient manner, as by means oi'irivets 15..

sharp .teeth as indie'atezatl, the sides are provided with somewhatrectangular o ,se'ts 16 for alining the" two vsideswhenl they are brought together. f

' Ill/'hile the screw threads form aconvenient method of attachment orvthe-insulator, yet it Will be observed. that some other form provedfpin, which Would'feome Withinthe spirit of this invention.

Having thuso described vmy vinvention, which, however, l: do. not Wishv to limit to the' form herein shown and described, eX- cept as pointed `out in the appended claims, what l' claimfand desire to secure by Letters Patent-is:

vl. An insulator pin formed from sheet metal, said pin being madejofttwo substanr'tially similar half portions, each 'of vsaid por-` tions being provided at one-end'with means j for engaging with an insulator arr-d'hai/lngy .their opposite'ends formed to makea driv-l ing point, the arrangement beingsuchv that when the two halves are placed together', i' they will form a substantially tubular pin,l

with' a driving point at one end'and insulator engaging means at the opposite end, the

ltubular pinv portion being sutlioiently yield ing so' that it will conform to, and engage closely With the-Wallsof thelhole in which it is'driven.

2. As a new article of manufacture, an

insulator pin comprising a stem with a head for engagement with anl insulator made .in two'conneoted 'halves Ifrom a singlaplece of ductlle material, the connectingportion be.

fing bentso as to bringthev tvvohalves tovgetherrto form the completed pin.

3;-A'device of 'the eharaeterset forth, comprisingtwo substantial-ly similar halves formedgfrom a single piece of sheet metal Vand 4connected together,`half threads pressed" .into each of said pieces, and means for aliningsaid threads .when the parts are placed together, the arrangement being such that completed pin ofsubstantially tubular form will be made,having threads at oneend and` a driving point at the opposite end..

4. The combination vwith an insulator, of a hollow pin formed of sheet metal, said pin having an enlargement adjacent to its driv ing point and also having proj eetionsadapted to hold the pinsecurely in driven position. l

l WALTER J. WXLSON Witnesses: f ALS. COOKE,

B. TRACY'.

.When the two halves are vfolded together, a. I' 

